Hatjser



2 Sheets-Sheet 1.

.(No Model.)

A. WBGMANN-HA'USER. I'EED APPARATUS FOR O'OAL DUST FURNACES. No. 601,539.

Patented Menu. 29, 1898.

2 Sheets-Sheet 2'.

(No Model.)

A. WBGMANN-HAUSER. FEED APPARATUS FOR GOAL DUST'PURNAGES. 539. f

, Patented Mar. 29, 1898.

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STATES FFICE.

FEED APPARATUS FOR COAL-DUST FURNACES.

SPECIFICATION forming part of Letters Patent Nb. 601,539, dated March 29, 1898.

. Application filed December 29, 1897. Serial No. 664,262. (No model.) Patented in Germany April 13, 1897,11'0. 95,698.

To all whom it may concern.-

Be it known that I, ARNOLD WEGMANN- HAUSER, a citizen of the Republic of Switzerland, residing at Enge-Zurich, in the Republic of Switzerland, have invented certain new and useful Improvements in Feed Apparatus for Goal-Dust Furnaces, of which the follow-- ing is a specification, and for which a German patent, No. 95,698, dated April 13, 1897, has been obtained.

This invention has for its object a feed apparatus for coal-dust furnaces.

A form of construction of this improved apparatus is shown as an example in the accompanying drawings, in which- Figure l is a sectional elevation of the arrangement as a whole; Fig. 2, a section of the air-mixing chest on the line A B of Fig. 1; Fig. 3, a longitudinal section, on an enlarged scale, of part of the conveying-channel with a distributing arrangement; Fig. 4, a horizontal section of Fig. 3 over the distributing-opening; Fig. 5, a vertical cross-section of the distributing-opening on the section-line E F of Fig. 3.

The coal-dust is contained in a receptacle a, into which it may be introduced through an opening a, capable of being closed. An elevator 12 is in the present instance arranged over this receptacle a, which elevator travels in the direction indicated by the arrows and discharges the coal-dust taken up into a pipe 5. This pipe I) is connected with a convoying-channel c by means of a flexible pipe 19 which may, for instance, be a canvas pipe. The conveying-channel is suspended by various springs c and may be oscillated by a suitable shaking mechanism 0 channel 0 has also a discharge-opening d at each furnace. In the case shown only one boiler-furnace is indicated. The slot-shaped discharge-opening cl, in order to obtain a disdownwardly-widenin g section and is provided The conveying-' with several air-inlet openings 6 e e e e (2. These openings are provided with flaps, by means of which the admission of air may be regulated. The coal-dust thus mixed with air passes into the furnace f of the boiler f. The surplus coal-dust which is not discharged through the openings 01 passes at the end of the forwarding-channel 0 into a downwardlydirected pipe g, which is connected with the collecting-receptacle a by means of a flexible pipe g, (canvas tube.) Where the conveyingchannel is of greater length, a conveying device must be substituted for the pipe g.

The feed apparatus hereinbefore described has many important advantages, which will be briefly enumerated. By the conveyingchannel 0 being always well supplied with coal-dust by the elevator b and the excess of coal-dust returned to the receptacle (1 by means of the pipe 9 the result is attained that an even layer of coal-dust always lies over the discharge-openings. The form of the discharge-openings shown in Figs. 3, 4, and 5 has for its object an even scattering or discharge of the coal-dust. The coal-dust contained between the notches of the slots 01 strikes against first one and then the other of the inclined faces at each alteration in the direction of movement of the conveying-chanried'along with that lying at both sides, but

on the change of movement experiences no resistance and is therefore ejected with the energy necessary for an effective delivery by the impetus and the action of the dust pressing on the slit. The quantity discharged may be suitably regulated by altering both the extent and number of the oscillations an the width of the slits.

Owing to the surplus coal-dust being again carried 01f by the pipe g and tube 9, any setting fast of the larger pieces of coal or other substances is avoided, as they pass through the pipe g into the receptacle a and accumulate on the floor of the same, where they may be removed at intervals.

Owing to the coal-dust having to pass through the hollow body or air-mixing chest 6, (shown in section in Fig. 2,) it is mixed with air which can enter through the adj ustable air-inlet flaps or valves e, 6 e e 6 and c As shown in the drawings, the firepipe may be entirely closed by means of the flap e By the hereinbefore-described arrangement of the air-inlet openings and the zigzag movement of the air thereby produced the coal-dust is thrown to and fro and thus thoroughly mixed with the gradually admitted air. An increasing speed is also imparted to it, so that finally air charged with coal-dust is obtained in which all parts have an equal speed, so that there is no tendency to separate, and thus a fuel is formed which corresponds to all requirements and which burns with the most effective results.

I declare that what I claim is-- 1. A fuel-feeder comprising a channel or trough-shaped conveyer provided inits bottom with a longitudinal slot, means for imparting an endwise reciprocating motion to the trough, means for supplying fuel to one end thereof, a feed-pipe having its intake below the aforesaid slot and its discharge connected with a combustion-chamber, said pipe provided at different points of its length with air-openings, for the purpose set forth.

2. A fuel-feeder comprising a channel or trough-shaped conveyer provided in its bottom,with a longitudinal slot, means for imparting an endwise reciprocating motion to the trough, means for supplying fuel to one end thereof, a feed-pipe having its intake below the aforesaid slot and itsv discharge connectediwith a combustion-chamber, said pipe provided at different points of its length with air-openings, and means for educting the excess of fuel from theopposite end of said trough, for the purpose setforth.

3. A fuel-feeder comprising a channel or trough-shaped conveyer, means for imparting an endwise reciprocating motion thereto, saidtrough provided in its bottom with a longitudinal slothavin g its side walls constructed to scatter the fuel as it passes through such slot, and a feed-pipe having its intake below said slot and its discharge connected with a combustion-chamber, for the purpose set forth.

4. A fuel-feeder comprising a channel ,or trough-shaped conveyer,means for imparting an endwise reciprocating motion thereto, said trough provided in its bottom with a longitudinal slothaving its side walls constructed to scatter the fuel as it passes through such slot, and a feed-pipe having its intake below said slot and its discharge connected with a combustion-chamber, and means for mixing air with the fuel during its. passage through said feed-pipe, for the purpose set forth.

5. A pulverulent-fuel feeder comprising a fuel receptacle or bin, an overhead conveyer trough or channel, means for conveying the fuel from said bin to one end of the trough, the latter provided in its bottom with alongitudinal slot, means for imparting to the trough an endwise reciprocating motion, a

feed-pipe having its intake below said slot and its outlet connected with a combustionchamber, said pipe having a sinuous fuelpassage, means for admitting air to said passage at different points, and means for returning the excess of fuel from the opposite end of the trough to the fuel-receptacle, for the purpose set forth.

6. A pulverulent-fuel feeder, comprising a fuel receptacle or bin, an overhead conveyer or trough, means for conveying the fuel from the bin to one end of said trough and means for imparting an endwise reciprocating motion thereto, said trough provided in its bottom with a longitudinal slot whose side walls are constructed to scatter the fuel as it passes through such slot, in combination with a feedpipe having its intake below the aforesaid slot and its discharge connected with a combustion-chamber, said pipe having a sinuous fuel passage increasing in cross sectional area from its intake to its discharge, means for admitting air to said pipe at different points and means for regulating the volume of air so admitted, for the purpose set forth.

7. In feed apparatus for coal-dust furnaces a spring-suspended feed or conveying channel adapted to receive an endwise oscillating movement and having a discharge-opening for each furnace to be fed, in combination with a hopper or chest mounted on each furnace-front to receive coal-dust from said discharge-opening and convey it to the furnace, substantially as described.

, 8. Infeed apparatusfor coal-dustfurnaces: a hopper or chest gradually increasing in width downward and having a zigzag or sinuous form, and provided with a number of airinlet openings in its sides; said hopper or chest being mounted on the furnace-front to receive and convey coal-dust to the furnace in such a way that the coal-dust in falling through the chest is well mixed with air drawn in through the air-inlet openings, substantially as and for the purpose hereinbefore set forth.

9. In feed apparatus for coal-dust furnaces; the combination with the hopper or chest 6 having air inlet openings in its sides, of hinged flaps for regulating the said openings, the bottom flap being adapted to completely close they entrance to thefurnace when required, substantially as described.

10. In feed apparatus for coal-dust furnaces: a feed or conveying channel adapted to be oscillated or shaken and having its discharge opening or openings notched or recessed along the edges substantially as and for the purpose hereinbefore set forth.

11. A feed apparatus for coal-dust furnaces comprising: a spring-suspended feed or conveying channel having a discharge-opening for each furnace to be fed; means for imparting an endwise oscillating movement to said channel; a hopper or chest mounted on each furnace-front and having air-inlet openings along its sides; a receptacle for the coal-dust;

means for elevating or supplying coal-dust from said receptacle to said channel; and a pipe with flexible connection at one end for returning surplus coal-dust from the feedchannel to the coal-dust receptacle; in combination, substantially as hereinbefore described.

In testimony whereof I hereunto siqn my name, in the presence of two subscribing witnesses, this 11th day of December, 1897.

ARNOLD WEGMANN-HAUSER.

Witnesses:

MORITZ VEIIH, H. LABBARD. 

